Buckland said (HW, 18 September) that clearing your allotment with glyphosate was "common sense" if you wanted to grow your own. He added that "some plants need a little peat in their potting mixes" and he would show a range of techniques on the show.
His comments were reported in the national media but the BBC, which is keen to give Buckland a broader appeal than his organic predecessor Monty Don, says he was quoted out of context.
Soil Association policy director Lord Peter Melchett said: "It is certainly much better to grow healthy and environmentally friendly food organically than to use sprays like Roundup, which Toby recommends."
Garden Organic horticulture advisor Andy Strachan said Buckland's comments highlighted a "lazy and hypocritical" approach to the use of chemicals in the garden.